//
//  ComposeViewController.swift
//  SinaWeibo
//
//  Created by 周小伟 on 16/8/24.
//  Copyright © 2016年 周小伟. All rights reserved.
//

import UIKit
import SnapKit
import SVProgressHUD

class ComposeViewController: UIViewController {

    @objc private func selectPicture(){
        selectorVC.view.snp_updateConstraints { (make) in
            make.height.equalTo(224 + 40)
        }
    }
    
    @objc private func close(){
        dismissViewControllerAnimated(true, completion: nil)
    }
    
    @objc private func send(){
        let urlString = "https://upload.api.weibo.com/2/statuses/upload.json"
        guard let token = UserAccountViewModel().token else{
            SVProgressHUD.showErrorWithStatus("客官，您还未登录哦？？？")
            return
        }
        
        if selectorVC.imageList.count >= 1{
            let imageData = UIImagePNGRepresentation(selectorVC.imageList[0])
            let parmaters = ["access_token":token,"status":textView.text]
            NetworkTools.sharedTools.uploadImage(urlString, parmaters: parmaters, imageData: imageData!, finished: { (result, error) in
                if error != nil{
                    SVProgressHUD.showErrorWithStatus("客官，你还未登录哦")
                    return
                }
                SVProgressHUD.showErrorWithStatus("发布微博成功")
            })
        }
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = UIColor.whiteColor()
        setupUI()
        // Do any additional setup after loading the view.
    }
    
    private func setupUI(){
        setNavBar()
        setupTextView()
        setupToolBar()
        setSelectorView()
        registerNotification()
    }
    
    private func setSelectorView(){
        addChildViewController(selectorVC)
        
        view.addSubview(selectorVC.view)
        
        view.bringSubviewToFront(toolBar)
        selectorVC.view.snp_makeConstraints { (make) in
            make.left.bottom.right.equalTo(view)
            make.height.equalTo(0)
        }
    }
    
    private func registerNotification(){
        NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(ComposeViewController.keyboardWillChange(_:)), name: UIKeyboardWillChangeFrameNotification, object: nil)
    }
    
    deinit{
        print("***********************")
        NSNotificationCenter.defaultCenter().removeObserver(self)
    }
    
    @objc private func keyboardWillChange(n:NSNotification){
        print(n)
        
        let duration = n.userInfo![UIKeyboardAnimationDurationUserInfoKey] as! Double
        let rect = (n.userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()
        
        let offset = -screenH + rect.origin.y
        toolBar.snp_updateConstraints { (make) in
            make.bottom.equalTo(offset)
        }
        UIView.animateWithDuration(duration) { 
            self.view.layoutIfNeeded()
        }
    }
    
    private lazy var textView:UITextView = {
        let tv = UITextView()
        tv.delegate = self
        tv.font = UIFont.systemFontOfSize(18)
        tv.textColor = UIColor.darkGrayColor()
        
        tv.keyboardDismissMode = UIScrollViewKeyboardDismissMode.OnDrag
        tv.alwaysBounceVertical = true
        return tv
    }()
    
    private lazy var placeHolderLabel:UILabel = UILabel(title: "分享新鲜事...", size: 18, color: UIColor.lightGrayColor())
    
    private lazy var toolBar = UIToolbar()
    private lazy var selectorVC:PictureSelectorViewController = PictureSelectorViewController()
}

extension ComposeViewController:UITextViewDelegate{
    func textViewDidChangeSelection(textView: UITextView) {
        placeHolderLabel.hidden = textView.hasText()
        self.navigationItem.rightBarButtonItem?.enabled = textView.hasText()
    }
}

extension ComposeViewController{
    private func setupToolBar(){
        view.addSubview(toolBar)
        toolBar.snp_makeConstraints { (make) in
            make.left.bottom.right.equalTo(view)
            make.height.equalTo(40)
        }
        
        var items = [UIBarButtonItem]()
        
        let itemSettings = [["imageName": "compose_toolbar_picture","actionName": "selectPicture"],
                            ["imageName": "compose_mentionbutton_background"],
                            ["imageName": "compose_trendbutton_background"],
                            ["imageName": "compose_emoticonbutton_background"],
                            ["imageName": "compose_add_background"]]
        for dict in itemSettings{
            let item = UIBarButtonItem(imageName: dict["imageName"]!, target: self, actionName: dict["actionName"])
            
            items.append(item)
            
            let space = UIBarButtonItem(barButtonSystemItem: .FlexibleSpace, target: nil, action: nil)
            items.append(space)
        }
        items.removeLast()
        
        toolBar.items = items
    }
    
    private func setupTextView(){
        view.addSubview(textView)
        
        textView.snp_makeConstraints { (make) in
            make.top.left.right.equalTo(self.view)
            make.height.equalTo(view.bounds.height/3)
        }
        
        textView.addSubview(placeHolderLabel)
        placeHolderLabel.snp_makeConstraints { (make) in
            make.top.equalTo(textView.snp_top).offset(8)
            make.left.equalTo(textView.snp_left).offset(5)
        }
    }
    
    private func setNavBar(){
        self.navigationItem.leftBarButtonItem = UIBarButtonItem(title: "关闭", style: .Plain, target: self, action: #selector(ComposeViewController.close))
        self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: "发布", style: .Plain, target: self, action: #selector(ComposeViewController.send))
        self.navigationItem.rightBarButtonItem?.enabled = false
        let titleView = UIView(frame: CGRect(x: 0, y: 0, width: 200, height: 40))
        navigationItem.titleView = titleView
        
        let titleLabel = UILabel(title: "发微博", size: 17, color: UIColor.darkGrayColor())
        let nameLabel = UILabel(title: UserAccountViewModel().userName ?? "", size: 14, color: UIColor.lightGrayColor())
        
        titleView.addSubview(titleLabel)
        titleView.addSubview(nameLabel)
        
        titleLabel.snp_makeConstraints { (make) in
            make.top.equalTo(titleView.snp_top)
            make.centerX.equalTo(titleView.snp_centerX)
        }
        nameLabel.snp_makeConstraints { (make) in
            make.bottom.equalTo(titleView.snp_bottom)
            make.centerX.equalTo(titleView.snp_centerX)
        }
    }
    
}